More info please

I have a Mesa Electra Dyne running into two Mesa 1x12 Thiele cabs both loaded with EVM12L speakers.

I'd like something that is a little less bass heavy and a little smoother on top.   It's missing that midrange growl.

Which speaker would work best in the Thiele cab and give me more of a vintage sound.

Also, I do play out, so I need something that can handle a bit more volume.

Thanks!

What are the exact dimensions of the cab?

They are built to the EV TL806 specifications.

Here is a link to the specs:  http://archives.telex.com/archives/EV/Builders%20Plans/TL806%20Builders%20Plans.pdf

A possible best choice would be th HM 75 - especially to open up the mids.  Also, the Blackhawk HP would give you exactly what you are looking for, but the Alnico models are spendy!  Both have a compatible Fs and Vas for that cab.  Do you run it ported or sealed?  I would recommend sealed for either of these models.

External Dimensions:

15-3/4in H

18-7/8in W

12-3/4in D